package com.lovegu.thread;

import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * @author 老顾
 * @title: TestSleep2
 * @projectName java-restudy
 * @email: 1437594522@qq.com
 * @date 2022/9/22 16:49
 */
public class TestSleep2 {
    public static void main(String[] args) {
        tenDown();
        //打印当前系统时间
        Date startTime = new Date(System.currentTimeMillis());//获取系统当前时间
        while (true){
            try {
                Thread.sleep(1000);
                System.out.println(new SimpleDateFormat("HH:mm:ss").format(startTime));
                startTime = new Date(System.currentTimeMillis());
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
    //模拟倒计时
    public static void tenDown(){
        int num = 10;
        while (true){
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println(num--);
            if (num<=0){
                break;
            }
        }
    }
}
